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Inventor(s)

Abstract

Social media, rating systems, trending news, and other online information sources rely on bona fide human contributors in order to function accurately and retain trust amongst information consumers. Inaccurate or false content, quickly and widely disseminated by bots, can cause erosion of trust in these platforms and have wider ramifications.

This disclosure describes techniques to generate CAPTCHA challenges that are difficult, and nearly impossible, for bots to solve. The challenges comprise gestural, emotive, or cognitive micro-tasks that involve physical interaction of the challenge-taker with multiple UI modes such as camera, touchscreen, etc.